Organic light-emitting display panel and device

ABSTRACT

Disclosed are an organic light-emitting display panel and an organic light-emitting display device. The organic light-emitting display panel comprises: a substrate, a second electrode, a light-emitting layer, a first hole transport layer and a first electrode that are successively laminated, wherein, the materials of both the first electrode and the second electrode are silver or silver-containing metallic materials, the material of the first hole transport layer is a conductive material doped with a P-type semiconductor material and a P-type semiconductor material layer is set between the first hole transport layer and the first electrode.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No.CN201710028398.3, filed on Jan. 16, 2017 and entitled “ORGANICLIGHT-EMITTING DISPLAY PANEL AND DEVICE”, the disclosure of which isincorporated herein by reference in its entirety.

TECHNICAL FIELD

Embodiments of the present disclosure relate to organic light-emittingdisplay technologies, and in particular, to an organic light-emittingdisplay panel and an organic light-emitting display device.

BACKGROUND

Organic Light-Emitting Display has become one of the importantdevelopment directions in display industries, because of its thetechnical advantages of no backlight source, high contrast, smallthickness, large visual angle and fast reaction speed, etc.,.

The existing organic light-emitting display panels are mainly dividedinto upright organic light-emitting display panels and inverted organiclight-emitting display panels. Among them, an upright organiclight-emitting display panel includes a substrate, an anode, alight-emitting layer and a cathode that are successively laminated.Although such a structure of the organic light-emitting display panelcan adjust charge balance well, the active metal in the cathode tends tobe eroded by water and oxygen, causing a very short lifetime of theorganic light-emitting display panel. The inverted organiclight-emitting display panel includes a substrate, a cathode, alight-emitting layer and an anode that are successively laminated. Inthe inverted organic light-emitting display panel, the active metal inthe cathode may be well protected from being eroded by water and oxygen;however, in such an organic light-emitting display panel, it is veryhard to achieve a balanced adjustment of hole injection and electroninjection, therefore a very high bias voltage is needed, and thelight-emitting efficiency is much lower than that of the upright organiclight-emitting display panel, so that it cannot meet the requirements onorganic light-emitting display panels in the market.

SUMMARY

The present disclosure provides an organic light-emitting display paneland an organic light-emitting display device, which enable adjusting thecharge balance in the organic light-emitting display panel, to lower thebias voltage required for the organic light-emitting display panel,thereby improving the light-emitting efficiency of the organiclight-emitting display panel and prolonging the lifetime of the organiclight-emitting display panel.

In a first aspect, embodiments of the present disclosure provide anorganic light-emitting display panel, which includes:

a substrate, a second electrode, a light-emitting layer, a first holetransport layer and a first electrode that are successively laminated;

wherein, the first electrode and the second electrode are both made ofsilver or silver-containing metallic materials, the material of thefirst hole transport layer is a conductive material doped with a P-typesemiconductor material, and a P-type semiconductor material layer is setbetween the first hole transport layer and the first electrode.

In a second aspect, embodiments of the present disclosure furtherprovide an organic light-emitting display device, which includes anyorganic light-emitting display panel according to the embodiments of thepresent disclosure.

In the embodiments of the present disclosure, the first electrode andthe second electrode are both made of silver or silver-containingmetallic material, the material of the first hole transport layer is aconductive material doped with a P-type semiconductor material, and aP-type semiconductor material layer is provided between the first holetransport layer and the first electrode. With such an arrangement, itsolves the problems of existing inverted organic light-emitting displaypanel of being very hard to achieve balanced adjustment of holeinjection and electron injection leading to high bias voltage requiredfor the organic light-emitting display panel, low light-emittingefficiency and short lifetime. With the organic light-emitting displaypanel and the organic light-emitting display device built according tothe embodiments of the present disclosure, one can adjust the chargebalance in the organic light-emitting display panel to lower the biasvoltage required for the organic light-emitting display panel, thusimproving the light-emitting efficiency of the organic light-emittingdisplay panel and prolonging the lifetime of the organic light-emittingdisplay panel.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross sectional view of a structure of an organiclight-emitting display panel according to one embodiment of the presentdisclosure;

FIG. 2 is a cross sectional view of a structure of another organiclight-emitting display panel according to one embodiment of the presentdisclosure;

FIG. 3 is a cross sectional view of a structure of yet another organiclight-emitting display panel according to one embodiment of the presentdisclosure;

FIG. 4 is a cross sectional view of a structure of yet another organiclight-emitting display panel according to one embodiment of the presentdisclosure;

FIG. 5 is a cross sectional view of a structure of yet another organiclight-emitting display panel according to one embodiment of the presentdisclosure;

FIG. 6 is a cross sectional view of a structure of yet another organiclight-emitting display panel according to one embodiment of the presentdisclosure;

FIG. 7 is a cross sectional view of a structure of yet another organiclight-emitting display panel according to one embodiment of the presentdisclosure;

FIG. 8 is a cross sectional view of a structure of yet another organiclight-emitting display panel according to one embodiment of the presentdisclosure;

FIG. 9 is a cross sectional view of a structure of yet another organiclight-emitting display panel according to one embodiment of the presentdisclosure; and

FIG. 10 is a top down view of an organic light-emitting display deviceaccording to one embodiment of the present disclosure.

DETAILED DESCRIPTION

The present disclosure will be further illustrated in detail inconjunction with the drawings and embodiments. It may be understoodthat, the specific embodiments described here are only set forexplaining, rather than limiting, the present disclosure. Additionally,it further needs to be noted that, for convenient description, thedrawings only show the parts related to the disclosure, rather than thewhole structure.

One embodiment of the application provides an organic light-emittingdisplay panel, which includes: a substrate, a second electrode, alight-emitting layer, a first hole transport layer and a first electrodethat are successively laminated; wherein, the material of both the firstelectrode and the second electrode is silver or silver-containingmetallic material, and the material of the first hole transport layer isa conductive material doped with a P-type semiconductor material, or aP-type semiconductor material layer is provided between the first holetransport layer and the first electrode. The first electrode is ananode, and the second electrode is a cathode.

In the embodiment of the present disclosure, the material of both thefirst electrode and the second electrode is silver or asilver-containing metallic material, the material of the first holetransport layer is a conductive material doped with a P-typesemiconductor material, and a P-type semiconductor material layer isprovided between the first hole transport layer and the first electrode,so that it solves the problem in the related art that in the existinginverted organic light-emitting display panel where it is very hard toachieve the balanced adjustment of hole injection and electroninjection, causing high bias voltage required for the organiclight-emitting display panel, low the light-emitting efficiency and theshort lifetime. With the organic light-emitting display panel builtaccording to the embodiments of the present disclosure, one can adjustthe charge balance in the organic light-emitting display panel, andlower the bias voltage required for the organic light-emitting displaypanel, thereby improving the light-emitting efficiency of the organiclight-emitting display panel and prolonging the lifetime of the organiclight-emitting display panel.

FIG. 1 is a cross sectional view of a structure of an organiclight-emitting display panel according to one embodiment of the presentdisclosure. Referring to FIG. 1, the organic light-emitting displaypanel includes: a substrate 10, a second electrode 12, a light-emittinglayer 13, a first hole transport layer 14 and a first electrode 11 thatare successively laminated. The materials of both the first electrode 11and the second electrode 12 are silver or silver-containing metallicmaterias, and the material of the first hole transport layer 14 isconductive material (host) doped with a P-type semiconductor material(dopant). The first electrode is an anode, and the second electrode is acathode.

During operation, a bias voltage is applied between the first electrode11 and the second electrode 12 of the organic light-emitting displaypanel, so that holes are injected from the first electrode 11 andmigrate toward the light-emitting layer 13 via the first hole transportlayer 14, and electrons are injected from the second electrode 12 andmigrate toward the light-emitting layer 13. On the light-emitting layer13, the holes and the electrons are recombined to generate excitons. Theexcitons are unstable, and hence energy can be released. The energy istransferred to the molecules of the organic light-emitting material inthe light-emitting layer 13, so that the molecules transit from a groundstate to an excited state. The excited state is very unstable, and thusthe excited molecules return to the ground state from the excited state,so that a light emitting phenomenon appears due to radiative transition.Therefore, in the organic light-emitting display panel, the performanceof the organic light-emitting display panel is determined by thehole-electron recombination efficiency. Moreover, the injectionsituation of the holes and the electrons affects the hole-electronrecombination efficiency.

It may be known according to Fowler-Nordheim (FN) tunneling model that,the material of both the first electrode 11 and the second electrode 12is silver or silver-containing metallic material, and the material ofthe first hole transport layer 14 is conductive material doped with aP-type semiconductor material. In such an arrangement, it contributes tolower the interfacial energy barrier between the first electrode 11 andthe first hole transport layer 14, improve the hole injection capacityand facilitate hole injection, and also it is favorable to adjust thecharge balance in the organic light-emitting display panel and lower thebias voltage required for the organic light-emitting display panel,thereby improving the light-emitting efficiency of the organiclight-emitting display panel and prolonging the lifetime of the organiclight-emitting display panel.

In a specific arrangement, the appropriate mass percent of the P-typesemiconductor material and the appropriate thickness of the first holetransport layer 14 may be selected according to the performancerequirements of the organic light-emitting display panel to bemanufactured. Optionally, the mass percent of the P-type semiconductormaterial in the first hole transport layer 14 may be greater than orequal to 1% but less than or equal to 10%. The thickness of the firsthole transport layer 14 may be greater than or equal to 50 Å but lessthan or equal to 300 Å.

The transport of holes in the first hole transport layer 14 isessentially realized by filling the holes with electrons in turn in acertain direction. Specifically, under the action of the electric field,electrons located on the highest occupied molecular orbit (HOMO) energylevel in the first hole transport layer 14 transit to the lowestunoccupied molecular orbit (LUMO) energy level of the P-typesemiconductor material and fill the holes near the first electrode 11,thereby forming new holes that are nearer to the light-emitting layer13. Therefore, the nearer the lowest unoccupied molecular orbit (LUMO)energy level of the P-type semiconductor material is to the highestoccupied molecular orbit (HOMO) energy level of the first hole transportlayer 14, the easier it will be for the generation of holes. Optionally,the lowest unoccupied molecular orbit (LUMO) energy level of the P-typesemiconductor material is less than −5 eV.

FIG. 2 is a cross sectional view of a structure of another organiclight-emitting display panel according to one embodiment of the presentdisclosure. In comparison with FIG. 1, the organic light-emittingdisplay panel provided in FIG. 2 further includes an electron transportlayer 15. Specifically, referring to FIG. 2, the electron transportlayer 15 is located between the second electrode 12 and thelight-emitting layer 13.

Optionally, the electron transport layer 15 is doped with at least oneof an alkali metal, an alkaline earth metal or a rare earth metal.Exemplarily, the electron transport layer 15 is doped with at least oneof lithium, cesium and ytterbium. With such an arrangement, theinterfacial energy barrier between the first electrode 11 and theorganic material (for example, the light-emitting layer 13) of theorganic light-emitting display panel may be lowered, thereby improvingthe electron injection capacity, facilitating the adjustment of thecharge balance in the organic light-emitting display panel and loweringthe bias voltage required for the organic light-emitting display panel,so that it improves the light-emitting efficiency of the organiclight-emitting display panel. In specific arrangement, appropriate masspercent of the metal doped in the electron transport layer 15 andappropriate thickness of the electron transport layer 15 may be selectedaccording to the performance requirements of the organic light-emittingdisplay panel to be manufactured. Optionally, the mass percent of themetal doped in the electron transport layer 15 ranges from 5% to 50%,and the thickness of the electron transport layer 15 is greater than 200Å.

It should be noted that, in specific arrangement, in order to adjust thecharge balance in the organic light-emitting display panel, it needs tobe considered comprehensively rather than independently, whendetermining the mass percent of the P-type semiconductor material in thefirst hole transport layer 14, the thickness of the first hole transportlayer 14, the mass percent of the metal doped in the electron transportlayer 15 and the thickness of the electron transport layer 15.

FIG. 3 is a structural representation of another organic light-emittingdisplay panel according to one embodiment of the present disclosure. Incomparison with FIG. 2, the first hole transport layer 14 in the organiclight-emitting display panel of FIG. 3 is not doped with P-typesemiconductor material; instead, a P-type semiconductor material layer16 is provided between the first hole transport layer 14 and the firstelectrode 11.

Similarly, it is known according to Fowler-Nordheim (FN) tunneling modelthat, by setting the material of both the first electrode 11 and thesecond electrode 12 as silver or a silver-containing metallic materialand providing a P-type semiconductor material layer 16 between the firsthole transport layer 14 and the first electrode 11, it helps to lowerthe interfacial energy barrier between the first electrode 11 and thefirst hole transport layer 14, thereby improving the hole injectioncapacity and facilitate hole injection.

In specific arrangement, the P-type semiconductor material layer with anappropriate thickness may be manufactured according to the performancerequirement of the organic light-emitting display panel to bemanufactured.

The transport of holes in the first hole transport layer 14 isessentially realized by filling the holes with electrons in turn in acertain direction. Specifically, under the action of the electric field,electrons located on the highest occupied molecular orbit (HOMO) energylevel in the first hole transport layer 14 transit to the lowestunoccupied molecular orbit (LUMO) energy level of the P-typesemiconductor material and fill the holes near the first electrode 11,thereby forming new holes that are nearer to the light-emitting layer13. Therefore, the nearer the lowest unoccupied molecular orbit (LUMO)energy level of the P-type semiconductor material is to the highestoccupied molecular orbit (HOMO) energy level of the first hole transportlayer 14, the easier it will be for the generation of holes. Optionally,the lowest unoccupied molecular orbit (LUMO) energy level of the P-typesemiconductor material is less than −5 eV.

Similarly, the electron transport layer 15 may be doped with at leastone of an alkali metal, an alkaline earth metal and a rare earth metal.In specific arrangement, in order to adjust the charge balance in theorganic light-emitting display panel, it needs to be consideredcomprehensively rather than independently, when determining thethickness of the P-type semiconductor material layer, the mass percentof the metal doped in the electron transport layer 15 and the thicknessof the electron transport layer 15.

FIG. 4 is a cross sectional view of a structure of yet another organiclight-emitting display panel according to one embodiment of the presentdisclosure. Referring to FIG. 4, the organic light-emitting displaypanel further includes a second hole transport layer 17, which islocated between the first hole transport layer 14 and the light-emittinglayer 13. Optionally, in order to lower the interfacial energy barrierbetween the first hole transport layer 14 and the second hole transportlayer 17, the conductive material (host) in the second hole transportlayer 17 is the same with that in the first hole transport layer 14.

FIG. 5 is a cross sectional view of a structure of yet another organiclight-emitting display panel according to one embodiment of the presentdisclosure. Referring to FIG. 5, the organic light-emitting displaypanel further includes an electron blocking layer 181, a hole injectionlayer 182, an electron injection layer 183 and a hole blocking layer184. The electron blocking layer 181 is located between thelight-emitting layer 13 and the second hole transport layer 17; the holeinjection layer 182 is located between the first hole transport layer 14and the first electrode 11; the electron injection layer 183 is locatedbetween the electron transport layer 15 and the second electrode 12; thehole blocking layer 184 is located between the electron transport layer15 and the light-emitting layer 13. It should be noted that, duringspecific manufacturing, the organic light-emitting display panel mayinclude at least one of the electron blocking layer 181, the holeinjection layer 182, the electron injection layer 183 and the holeblocking layer 184.

In the above technical solution, the materials of both the firstelectrode 11 and the second electrode 12 are silver or silver-containingmetallic materials. Optionally, the material of the first electrode 11and/or the second electrode 12 may be silver-magnesium alloy orsilver-ytterbium alloy. The mass percent of silver in the firstelectrode 11 and/or the second electrode 12 may be greater than or equalto 10%. In use, at least one of the first electrode 11 and the secondelectrode 12 may function as an emergent light side electrode of theorganic light-emitting display panel. Detailed illustration will begiven below by typical examples.

FIG. 6 is a structural representation of yet another organiclight-emitting display panel according to one embodiment of the presentdisclosure. Referring to FIG. 6, in the organic light-emitting displaypanel, only the second electrode 12 is taken as an emergent light sideelectrode, and light is emitted out via the second electrode 12 and thesubstrate 10 after being formed in the light-emitting layer 13. Such anorganic light-emitting display panel is also referred to as an invertedbottom-emission type organic light-emitting display panel. In thepresent embodiment, the material of both the first electrode 11 and thesecond electrode 12 is silver or silver-containing metallic material. Inorder to make the first electrode 11 have good reflection effect andmake the second electrode 12 have good light transmittance, thethickness of the first electrode 11 may be set as greater than 30 nm,and the thickness of the emergent light side electrode (the secondelectrode 12) may be set as less than 30 nm.

TABLE 1 External Quantum Bias Voltage Efficiency Lifetime ExperimentalGroup 4 V 6% 100 hours Contrast Group 4 V 6%  70 hours

Performance parameters of different organic light-emitting displaypanels are given in Table 1. Experimental Group is the invertedbottom-emission type organic light-emitting display panel according tothe present application. Contrast Group is an existing uprightbottom-emission type organic light-emitting display panel. “BiasVoltage” refers to a bias voltage applied by the first electrode 11 andthe second electrode 12 on the organic light-emitting display panel.“Lifetime” refers to the working time of an organic light-emittingdisplay panel for which the luminance of the organic light-emittingdisplay panel attenuates from initial lightness to 95% of the initiallightness. It should be noted that, in Table 1, the bias voltage, theexternal quantum efficiency and the lifetime of the organiclight-emitting display panels in Contrast Group and Experimental Groupare all measured under the same experimental conditions (including thesame current density).

Referring to Table 1, the bias voltage and the external quantumefficiency required for the inverted bottom-emission type organiclight-emitting display panel in Experimental Group are identical withthat of the upright bottom-emission type organic light-emitting displaypanel in Contrast Group, respectively. However, the lifetime of theinverted bottom-emission type organic light-emitting display panel inExperimental Group is much longer than the lifetime of the uprightbottom-emission type organic light-emitting display panel in ContrastGroup. This indicates that, the performance of the organiclight-emitting display panel according to the embodiments of the presentapplication is much better than that of the existing organiclight-emitting display panel.

FIG. 7 is a cross sectional view of a structure of yet another organiclight-emitting display panel according to one embodiment of the presentdisclosure. Referring to FIG. 7, in the organic light-emitting displaypanel, only the first electrode 11 is taken as an emergent light sideelectrode, and light is emitted out via the first electrode 11 afterbeing formed in the light-emitting layer 13. Such an organiclight-emitting display panel is also referred to as an invertedtop-emission type organic light-emitting display panel. In the presentembodiment, the materials of both the first electrode 11 and the secondelectrode 12 are silver or silver-containing metallic materials. Inorder to make the second electrode 12 have good reflection effect andmake the first electrode 11 have good light transmittance, the thicknessof the second electrode 12 may be set as greater than 30 nm, and thethickness of the emergent light side electrode (the first electrode 11)may be set as less than 30 nm.

TABLE 2 External Quantum Bias Voltage Efficiency Lifetime ExperimentalGroup 4 V 10.5% 100 hours Contrast Group 4 V   10%  50 hours

Performance parameters of different organic light-emitting displaypanels are given in Table 2. Experimental Group is an invertedtop-emission type organic light-emitting display panel according to thepresent application. Contrast Group is an existing upright top-emissiontype organic light-emitting display panel. Bias Voltage refers to a biasvoltage applied by the first electrode 11 and the second electrode 12 onthe organic light-emitting display panel. Lifetime refers to the workingtime of an organic light-emitting display panel for which the luminanceof the organic light-emitting display panel attenuates from initiallightness to 95% of the initial lightness. It should be noted that, inTable 2, the bias voltage, the external quantum efficiency and thelifetime of the organic light-emitting display panels in Contrast Groupand Experimental Group are all measured under the same experimentalconditions (including the same current density).

Referring to Table 2, the bias voltage required for the invertedtop-emission type organic light-emitting display panel in ExperimentalGroup is identical with the bias voltage of the upright top-emissiontype organic light-emitting display panel in Contrast Group. However,the external quantum efficiency of the inverted top-emission typeorganic light-emitting display panel in Experimental Group is somewhathigher than that of the upright top-emission type organic light-emittingdisplay panel in Contrast Group, and the lifetime of the invertedtop-emission type organic light-emitting display panel in ExperimentalGroup is much longer than that of the upright top-emission type organiclight-emitting display panel in Contrast Group. This indicates that, theperformance of the organic light-emitting display panel according to theembodiments of the present application is better than that of theexisting organic light-emitting display panels.

FIG. 8 is a cross sectional view of a structure of yet another organiclight-emitting display panel according to one embodiment of the presentdisclosure. Referring to FIG. 8, in the organic light-emitting displaypanel, both the first electrode 11 and the second electrode 12 are takenas emergent light side electrodes, and after being formed in thelight-emitting layer 13, one part of the light is emitted out via thefirst electrode 11, and the other part of the light is emitted out viathe second electrode 12. Exemplarily, if the materials of both the firstelectrode 11 and the second electrode 12 are silver or silver-containingmetallic materials, in order to make both the first electrode 11 and thesecond electrode 12 have good light transmittance, the thickness of theemergent light side electrodes (including the first electrode 11 and thesecond electrode 12) may be set as less than 30 nm.

FIG. 9 is a cross sectional view of a structure of yet another organiclight-emitting display panel according to one embodiment of the presentdisclosure. As shown in FIG. 9, the organic light-emitting display panelmay further include an optical coupling layer 20. The optical couplinglayer 20 is located on one side of the emergent light side electrode ofthe organic light-emitting display panel that is facing away from thelight-emitting layer 13. In FIG. 9, only the first electrode 11 is theemergent light side electrode, and the optical coupling layer 20 islocated on one side of the first electrode 11 of the organiclight-emitting display panel that is facing away from the light-emittinglayer 13.

Considering that the organic light-emitting display panel does notinclude an optical coupling layer 20, the process in which the light isemitted from the emergent light side electrode (the first electrode 11)into the air will essentially be a process in which the light is emittedfrom an optically denser medium into an optically thinner medium. Thelight tends to be reflected on the interface between the emergent lightside electrode (the first electrode 11) and the air, and hence the lighttransmittance will be lowered. In the technical solutions of thisapplication, the arrangement of the optical coupling layer 20 isessentially to change the refractive index of the contact surfacebetween the emergent light side of the organic light-emitting displaypanel and the air so as to suppress the reflection of light, therebyimproving the light transmittance.

Based on the above technical solution, the material of thelight-emitting layer 13 may be an organic material doped with alight-emitting material. The light-emitting material may redlight-emitting material, green light-emitting material or bluelight-emitting material. In use, optionally, the light emitted by thered light-emitting material, the light emitted by the greenlight-emitting material and the light emitted by the blue light-emittingmaterial are mixed to obtain white light. Optionally, the mass ratio ofthe light-emitting material is greater than or equal to 1% and is lessthan or equal to 20%. The organic material in the light-emitting layer13 may only include certain organic material, or it may be a mixture ofa plurality of organic materials, which is not limited in the presentdisclosure.

One embodiment of the present disclosure further provides an organiclight-emitting display device. FIG. 10 is a top view of an organiclight-emitting display device according to one embodiment of the presentdisclosure. Referring to FIG. 10, the organic light-emitting displaydevice 101 includes any organic light-emitting display panel 201according to the embodiments of the present disclosure. Specifically,the organic light-emitting display device 101 may be a mobile phone, anotebook computer, an intelligent wearable device and an informationinquiry machine in a public hall.

In the organic light-emitting display device according to theembodiments of the present disclosure, the material of both the firstelectrode and the second electrode in its internal organiclight-emitting display panel is silver or silver-containing metallicmaterial, the material of the first hole transport layer is a conductivematerial doped with a P-type semiconductor material or a P-typesemiconductor material layer is provided between the first holetransport layer and the first electrode. With such an arrangement, itsolves the problems of the existing inverted organic light-emittingdisplay panel that it is very hard to achieve balanced adjustment ofhole injection and electron injection so that the bias voltage requiredfor the organic light-emitting display panel is high, the light-emittingefficiency is lower and the lifetime is very short. With the the organiclight-emitting display device according to the embodiments of thepresent disclosure, it can adjust the charge balance in the organiclight-emitting display panel and lower the bias voltage required by theorganic light-emitting display panel, thus improving the light-emittingefficiency of the organic light-emitting display panel and prolongingthe lifetime of the organic light-emitting display panel.

It should be noted that the embodiments of the present disclosure andthe technical principles used therein are described as above. It shouldbe appreciated that the disclosure is not limited to the particularembodiments described herein, and any apparent alterations, modificationand substitutions can be made without departing from the scope ofprotection of the disclosure. Accordingly, while the disclosure isdescribed in detail through the above embodiments, the disclosure is notlimited to the above embodiments and can further include otheradditional embodiments without departing from the concept of thedisclosure.

What is claimed is:
 1. An organic light-emitting display panel,comprising: a substrate, a second electrode, a light-emitting layer, afirst hole transport layer and a first electrode, wherein the substrate,the second electrode, the light-emitting layer, the first hole transportlayer and the first electrode are successively laminated; wherein, thefirst electrode and the second electrode are both made of silver orsilver-containing metallic materials; and wherein the first holetransport layer is made of a conductive material doped with a P-typesemiconductor material, wherein a P-type semiconductor material layer isprovided between the first hole transport layer and the first electrode.2. The organic light-emitting display panel as claimed in claim 1,wherein in the case that the first hole transport layer is made of aconductive material doped with a P-type semiconductor material, a masspercent of the P-type semiconductor material in the first hole transportlayer is greater than or equal to 1% and is less than or equal to 10%.3. The organic light-emitting display panel as in claim 1, wherein alowest unoccupied molecular orbital energy level of the P-typesemiconductor material is less than −5 eV.
 4. The organic light-emittingdisplay panel as in claim 1, wherein a thickness of the first holetransport layer is ranges from 50 Å to 300 Å.
 5. The organiclight-emitting display panel as in claim 1, further comprising: anelectron transport layer, which is located between the second electrodeand the light-emitting layer.
 6. The organic light-emitting displaypanel as in claim 5, wherein the electron transport layer is doped withat least one of an alkali metal, an alkaline earth metal and a rareearth metal.
 7. The organic light-emitting display panel as in claim 6,wherein the electron transport layer is doped with at least one oflithium, cesium and ytterbium.
 8. The organic light-emitting displaypanel as in claim 6, wherein a mass percent of the metal doped in theelectron transport layer from 5% to 50%.
 9. The organic light-emittingdisplay panel as in claim 5, wherein the thickness of the electrontransport layer is greater than 200 Å.
 10. The organic light-emittingdisplay panel as in claim 5, further comprising a second hole transportlayer, located between the first hole transport layer and thelight-emitting layer.
 11. The organic light-emitting display panel as inclaim 10, further comprising: at least one of an electron blockinglayer, a hole injection layer, an electron injection layer and a holeblocking layer, wherein the electron blocking layer is located betweenthe light-emitting layer and the second hole transport layer; the holeinjection layer is located between the first hole transport layer andthe first electrode; the electron injection layer is located between theelectron transport layer and the second electrode; and the hole blockinglayer is located between the electron transport layer and thelight-emitting layer.
 12. The organic light-emitting display panel as inclaim 1, wherein at least one of the first electrode and the secondelectrode is made of a silver-magnesium alloy or a silver-ytterbiumalloy.
 13. The organic light-emitting display panel as in claim 12,wherein a mass percent of silver in at least one of the first electrodeand the second electrode is greater than or equal to 10%.
 14. Theorganic light-emitting display panel as in claim 1, wherein at least oneof the first electrode and the second electrode is an emergent lightside electrode of the organic light-emitting display panel.
 15. Theorganic light-emitting display panel as in claim 14, wherein a thicknessof the emergent light side electrode is less than 30 nm.
 16. The organiclight-emitting display panel as in claim 14, further comprising: anoptical coupling layer, which is located on one side of the emergentlight side electrode of the organic light-emitting display panel that isfacing away from the light-emitting layer.
 17. An organic light-emittingdisplay device, comprising an organic light-emitting display panelcomprising: a substrate, a second electrode, a light-emitting layer, afirst hole transport layer and a first electrode, wherein the substrate,the second electrode, the light-emitting layer, the first hole transportlayer and the first electrode are successively laminated; wherein, thefirst electrode and the second electrode are both made of silver orsilver-containing metallic materials; and wherein the first holetransport layer is made of a conductive material doped with a P-typesemiconductor material, and wherein a P-type semiconductor materiallayer is provided between the first hole transport layer and the firstelectrode.